diff --git a/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/KotlinNativeBenchmarkingPlugin.kt b/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/KotlinNativeBenchmarkingPlugin.kt
index dc21ff8fb65..1175301b97b 100644
--- a/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/KotlinNativeBenchmarkingPlugin.kt
+++ b/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/KotlinNativeBenchmarkingPlugin.kt
@@ -109,6 +109,9 @@ open class KotlinNativeBenchmarkingPlugin: BenchmarkingPlugin() {
         project.configureJVMTarget()
     }
 
+    override fun getCompilerFlags(project: Project, nativeTarget: KotlinNativeTarget) =
+            super.getCompilerFlags(project, nativeTarget) + project.nativeBinary.freeCompilerArgs.map { "\"$it\"" }
+
     override fun NamedDomainObjectContainer<KotlinSourceSet>.configureSources(project: Project) {
         project.benchmark.let {
             commonMain.kotlin.srcDirs(*it.commonSrcDirs.toTypedArray())
diff --git a/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/SwiftBenchmarkingPlugin.kt b/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/SwiftBenchmarkingPlugin.kt
index 3604e0a9386..5f0c8bdadbb 100644
--- a/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/SwiftBenchmarkingPlugin.kt
+++ b/build-tools/src/main/kotlin/org/jetbrains/kotlin/benchmark/SwiftBenchmarkingPlugin.kt
@@ -100,7 +100,7 @@ open class SwiftBenchmarkingPlugin : BenchmarkingPlugin() {
 
     override fun getCompilerFlags(project: Project, nativeTarget: KotlinNativeTarget) =
             if (project.benchmark.useCodeSize == CodeSizeEntity.FRAMEWORK) {
-                super.getCompilerFlags(project, nativeTarget)
+                super.getCompilerFlags(project, nativeTarget) + framework.freeCompilerArgs.map { "\"$it\"" }
             } else {
                 listOf("-O", "-wmo")
             }